Bulma on the other hand is a more traditional CSS framework with an existing set of components you can build on. It's similar to Bootstrap, Semantic UI, Material UI, and many others. One notable thing about Bulma, aside from it's nice responsive design, is it doesn't force you to use any specific javascript library.
Traditional frameworks (e.g. Bulma) are great if you don't have lots of design experience but want to build something decent looking. You just grab the snippets you want and get rolling. You can customize things, but you'll need to learn their system.
Utility first is great if you know the design you want to build but don't want to deal with writing vanilla CSS. Tailwind can speed this up quite substantially.
I've used and like both, but since I care more about doing custom designs and build my own components I almost always go for Tailwind.
This nails it the head. As someone with very little experience in frontend technologies I found that Bulma was very clear in the purpose of each class and how they could be used together.
I'm also using a Tailwind template in another project, but probably because I didn't build it by hand, I found it harder to wrap my ahead around it.